The rapid erection tower crane exhibits the fundamental attributes of a tower crane, while also enabling expeditious transition between operational and transport modes. Nevertheless, the lifting arms of fast-frame towers are typical of the folding variety. In light of the aforementioned considerations, this paper focuses on the structural optimization design and methodology of the novel fast tower telescopic boom. The initial stage of the process is to devise the design for the telescoping mechanism and the overall configuration of the boom. This involves optimizing the cross-sectional shape of the boom segment, determining the layout of the trolley track, and establishing principles for ensuring a smooth extension and secure boom locking. Subsequently, into order determine the optimal solution for the sizing of the telescopic horizontal arm, a bi-objective optimization strategy based on the NSGA-II algorithm was employed to optimize the scaling design. The two key parameters, namely the total machine lift weight and the weight of the top chord of the boom section, are optimized, and the optimal solution set for the size of the telescopic horizontal boom is obtained. In to order ascertain the structural rationality of the novel fast tower, a finite element simulation of the telescopic horizontal arm of the new fast tower was conducted. The reliability of the strength and stiffness of the telescopic arm part in actual work can be determined through finite element joint simulation analysis, which allows for the evaluation of the structural integrity of the component under various operational conditions.